Machine for grinding valves



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1 T. BJ B'ELFIBLD M Machine for Grinding Valves.

(No. 235,495. Patented Dec. 14, 1880.

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' T. B. BELPLELDL I Machine for Grinding Valves.-

" -No. -235,' 495. Patented De'c.14, 1880.

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N. PETERS. PHOTO-UTHOGRAPHER. WASHING'IOKI D. C.

p UNITED STATES PATENT OFFIQEO T. BROOM BELFIELD, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR GR INDING VALVES.

SPECIFICATION forming part of Letters Patent No. 235,495, dated December 14, 1880.

To all whom it may concern:

Be it known that I, T. BROOM BELFIELD,

-- a citizen of the United States, residing in Phil- In the accompanying drawings, Figure'l,

Sheet 1, is a front view of the faucet-grinding machine; Fig. 2, Sheet 2, a side view, in sec tion Figs. 3 and 4, views of detached parts of the machine; Fig. 5, a view of the chest and plug of an ordinary faucet on which the machine is intended to operate; and Fig. 6, a perspective view of the universally-jointed chuck for holding the plug of the faucet.

A is the frame of the machine, on which is a table, B, having at suitable intervals pairs of adjustable plates a at for holding a number of chests, 0, Fig. 5, to be operated on, the vertical. portion of each plate having a conical projection, b, and the projections of the two plates entering the opposite branches, d d, of the chest,

which is thus centered and held by and between the said plates.

- The inner plate of each pair, although adjustable, is not moved as long as chests of one kind are operated on, the outer plate only being moved away from the inner plate when a chest has to be removed to make way for another chest, which is adjusted to the projection of the plate a, the plate a being then so adjusted as to confine the chest.

It should be understood that while this device is applicable to chests such as are shown in Fig. 5, other devices may be required for confining faucet-chests or other objects of different characters.

It will'be seen on referring to Fig. 1 that there are four vertical spindles, D 5 but it will not be necessary to refer to more than one, as

all are alike and as the adjuncts of one spin- Application filed September 21, 1880. (N 0 model.)

dle and the mechanism for operating it are the same throughout the series of spindles. Indeed, a machine may be made with one spindle only, or with more than four spindles.

The lower bearing, 0, of the spindle D is secured to a cross-bar of the frame, the spindle extending through a sleeve, f, the bearing h of which is secured to another cross-bar of the frame, the sleeve being arranged to slide in the bearing, but being incapable of turning independently of the spindle.

A pinion, E, is secured to the sleeve, and this pinion gears into a horizontal rack, F, which is adapted to guides in the frame, and to which a reciprocating motion may be imparted by any suitable mechanism, the devices employed in the present instance being explained hereinafter.

To the spindle, near the upper end of the same, is adj ustably secured a collar, 2', grooved to receive a ring, to which the forked end of an arm, G, is pivoted, this lever being connected by a link to a bracket, H, projecting from the frame of the machine, and the said arm G being connected by a cord or chain, I, which' passes over the elevated pulley j, to a treadle, J, situated near the lower end of the machine and pivoted to the latter at k. This treadle has an adjustable weight, m, for a purpose explained hereinafter, and is so adapted to a hook, at, projecting from the floor, that the said hook will retain the treadle, which, however, can be released from the hook by the foot of the attendant.

The lower end of the spindle D is provided with a universally-jointed chuck, p, to which the projection on the top of the plug M of the faucet is connected, the character of this chuck being too fully shown in the perspective view, Fig. 6, to need description.

()n the outer end of the arm G is an antifriction roller or pulley, q, and on the top of the rack F are as many cam-like projections t as there are spindles, the duty of each projection being to raise one of the spindles through the medium of the arm G and its roller and permit it to fall as the rack recip rocates.

In describing the operation of the machine I will suppose that the spindle D is retained in the elevated position shown in Fig. 2 by the hook at, which retains the treadle J, and

that a reciprocating motion isimparted to the rack F.

The first duty of the attendant is to adjust a chest, C, of the faucet to its place between 1 the plates (1 a of the table B, and to attach the plug M of the faucet to the universallyjointed chuck p, the spindle being stationary, as the pinion E is out of gear with the rack. The attendant now moves the treadle clear of the retaining-hook, when the spindle will fall by its own weight, the pinion will be thrown into gear with the reciprocating rack, and the plug of the faucet will come into contact with its seat in the chest, and will be forced into the same with a pressure determined in a great measure by the position of the weight in on the treadle J. Owing to the reciprocating rack the spindle I) will be rotated, or partially rotated, first in one direction and then in the other, and the cam-like projection t on the rack will at intervals raise the spindle and plug and permit it to fall.

The grinding of the plug to its seal; is substantially the same as that accomplished by the ordinary manipulating operation, in which the plug is seized by the hand, forced to its seat, turned backward and forward two or three times, then elevated from its seat, so that particles of sand or emery can seek new positions, a'gain forced to its seat and rotated, and so on until the plug fits truly and tightly to its seat.

The universally -jointed chuck p is an important element of the machine, as it permits the plug to be laterally controlled by the seat when the plug is in contact with the latter, the spindle exerting no influence in controlling theplug laterally. The universally-jointed chuck, in fact, may be said to take the place of the operators wrist in grinding the plug to its seat by hand.

In operating on larger faucets greater pressure must be exerted on the plug than when small faucets are operated on, and the pressure may be modified by the adjustment of the weight on the treadle, for the greater the distance of the weight from the pivot k the less will be the pressure exerted on the plug, the 1 weight of the spindle and its attachments being diminished by the counterbalancing effect of the weight.

When the plug has been ground to its place I the treadle J is depressed and the spindle consequently elevated and thrown out of gear with the rack, when both chest and plug may be removed to make way for others, which are ground by a repetition of the above-described operations.

I will now proceed to describe the mechanism employed in the present instance for imparting a reciprocating motion to the rack F.

A pinion, w, on the driving-shaft N, gears into a wheel, I, on the shaft R. Through a radially-elongated slot in one of the arms of the wheel 1 passes a bolt, projecting from a sliding block, T, Fig. 3, which is adapted to vertical guide, V, secured to the back of the rack I and steadied thereon by braces to. As the wheel I tnrnsa reciprocating motion must be imparted to the rack, the block '1 sliding up and down in the guide on the rack, the extent of the motion of which is determined by the distance of the block from the center of the wheel, and this distance can be altered by the adjustment of the said block.

I claim as my invention- 1. A grinding-machine in which devices for holding the chest of a valve or faucet are combined with a plug-holding vertical spindle and with mechanism for rotating the said spindle first in one direction and then in the other and for raising the spindle and permitting it to fall, all substantially as set forth.

2. The combination of the chest-holding devices with the rotating and vertically-reciproeating spindle having a universally-jointed plug-holdiugch uck, substantially as described.

3. The combination of the spindle 1), its sleeve, and the pinion E, secured to the same, with the reciprocating rack F, and the camlike projection t on said rack, and with devices through the medium of which the said projection is caused to elevate the spindle and permit it to fall.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

T. BROOM BELFIELD.

Witnesses:

JAMES F. TOBIN, HARRY SMITH. 

